Code review comment for lp:~soren/nova/secgroup-fixes

Soren:

I'm also getting a failure w/ this branch on Smokestack:

(nova.rpc): TRACE: File "/usr/lib/pymodules/python2.6/nova/network/linux_net.py", line 614, in update_dhcp
(nova.rpc): TRACE: _execute(*cmd, run_as_root=True)
(nova.rpc): TRACE: File "/usr/lib/pymodules/python2.6/nova/network/linux_net.py", line 710, in _execute
(nova.rpc): TRACE: return utils.execute(*cmd, **kwargs)
(nova.rpc): TRACE: File "/usr/lib/pymodules/python2.6/nova/utils.py", line 188, in execute
(nova.rpc): TRACE: cmd=' '.join(cmd))
(nova.rpc): TRACE: ProcessExecutionError: Unexpected error while running command.
(nova.rpc): TRACE: Command: sudo FLAGFILE=/etc/nova/nova.conf NETWORK_ID=1 dnsmasq --strict-order --bind-interfaces --interface=xenbr0 --conf-file= --domain=novalocal --pid-file=/var/lib/nova/networks/nova-xenbr0.pid --listen-address=192.168.0.1 --except-interface=lo --dhcp-range=192.168.0.2,static,120s --dhcp-lease-max=256 --dhcp-hostsfile=/var/lib/nova/networks/nova-xenbr0.conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro
(nova.rpc): TRACE: Exit code: 2
(nova.rpc): TRACE: Stdout: ''
(nova.rpc): TRACE: Stderr: '\ndnsmasq: failed to create listening socket for fe80::f4d9:9eff:fe86:44cf: No such device or address\n'
(nova.rpc): TRACE:
2011-09-16 17:29:27,469 ERROR nova.rpc [-] Returning exception Unexpected error while running command.

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Let me know if you need more info.